CN110660549A - Lightning arrester and power transmission system - Google Patents
Lightning arrester and power transmission system Download PDFInfo
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- CN110660549A CN110660549A CN201910955633.0A CN201910955633A CN110660549A CN 110660549 A CN110660549 A CN 110660549A CN 201910955633 A CN201910955633 A CN 201910955633A CN 110660549 A CN110660549 A CN 110660549A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
- H01C1/082—Cooling, heating or ventilating arrangements using forced fluid flow
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Abstract
The invention discloses an arrester and a power transmission system, relates to the technical field of power equipment, and is used for improving the heat dissipation efficiency of the arrester so that the arrester can normally operate at a high charge rate for a long time in a power transmission system or other power transmission systems with continuously improved power transmission voltage classes. This arrester includes: the lightning arrester comprises a shell, a first connector and a second connector, wherein a lightning arrester core column formed by stacking a plurality of resistance valve plates is installed in the shell; the condenser is arranged outside the shell and is connected in series between the first interface and the second interface through a pipeline; wherein, be provided with the evaporation cooling medium in the casing, the arrester core post soaks in the evaporation cooling medium. By the technical scheme, the heat dissipation efficiency of the lightning arrester is improved, the resistance valve plate of the lightning arrester is not easy to be thermally damaged, and the voltage resistance of the lightning arrester is further improved.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a lightning arrester and a power transmission system.
Background
At present, a lightning arrester main body is usually wrapped and sealed by epoxy resin and a silicon rubber insulator layer by layer. Because the arrester structure is airtight, lead to the heat in the arrester not in time to distribute, the radiating efficiency is extremely low. Further, the components in the arrester are easily aged or damaged due to the over-high temperature, and the chargeability of the arrester is limited. Therefore, the existing lightning arrester is difficult to adapt to the continuous promotion of the transmission voltage grade, is difficult to continuously and normally operate for a long time at a high charge rate in a transmission system, and simultaneously reduces the aging loss and the failure rate of the lightning arrester.
Disclosure of Invention
The invention aims to provide an arrester and a power transmission system, which are used for improving the heat dissipation efficiency of the arrester, enabling the arrester to normally operate for a long time at a high charging rate in a power transmission system with continuously improved power transmission voltage class, and reducing the aging loss and the failure rate of the arrester.
In order to achieve the above purpose, the invention provides the following technical scheme:
a first aspect of the present invention provides an arrester comprising: the lightning arrester comprises a shell, a first connector and a second connector, wherein a lightning arrester core column formed by stacking a plurality of resistance valve plates is installed in the shell; the condenser is arranged outside the shell and is connected in series between the first interface and the second interface through a pipeline; wherein, be provided with the evaporation cooling medium in the casing, the arrester core post soaks in the evaporation cooling medium.
Optionally, the condenser includes a first channel communicated between the first port and the second port, and a second channel spaced apart from the first channel.
Optionally, the arrester further comprises: two ends of the external circulation pipe are respectively butted with two ends of the second channel to form a closed loop passage, and cooling water is arranged in the closed loop passage; the water machine is arranged on the external circulation pipe.
Optionally, the lightning arrester further comprises a water inlet pipe and a water outlet pipe which are respectively arranged at two ends of the second channel, the water inlet pipe and the water outlet pipe are respectively communicated with the second channel, and the water inlet pipe and the water outlet pipe can be connected to a water-cooling circulation pipeline of the converter valve tower.
Optionally, the arrester still includes the liquid distribution shower nozzle that sets up on the inlet tube, divides the inlet and the inlet tube intercommunication of liquid distribution shower nozzle, divides the hydrojet mouth of liquid shower nozzle towards the condenser.
Optionally, the arrester further comprises a liquid collecting tray arranged below the condenser, and a liquid drainage hole is formed in the bottom of the liquid collecting tray.
Optionally, the lightning arrester further comprises a drain pipe communicating the drain hole with the water outlet pipe.
Optionally, the condenser is located at a position above a liquid level of the evaporative cooling medium within the housing.
Optionally, the lightning arrester further includes a plurality of metal cushion blocks, and each metal cushion block and each resistance valve sheet are sequentially and alternately stacked.
Based on the technical solution of the lightning arrester, a second aspect of the present invention provides a power transmission system including the lightning arrester according to any one of the above technical solutions.
Compared with the prior art, the lightning arrester and the power transmission system provided by the invention have the following beneficial effects:
the lightning arrester provided by the invention comprises a shell and a plurality of resistance valve plates arranged in the shell, wherein the plurality of resistance valve plates are stacked to form a lightning arrester core column, and the plurality of resistance valve plates of the lightning arrester core column can be connected in a power transmission system when in use so as to protect electrical equipment from being damaged by transient overvoltage. Because the evaporative cooling medium is arranged in the shell, the lightning arrester core column is soaked in the evaporative cooling medium, when the lightning arrester passes through a large short-circuit current, the resistance valve block generates heat, and the evaporative cooling medium evaporates and absorbs heat, so that the temperature of the lightning arrester core column can be quickly reduced, the risk of overheating and burning of the resistance valve block is effectively reduced, and the transient absorption capacity of the lightning arrester is greatly improved. In addition, the condenser is arranged outside the shell by arranging the first interface at the top of the shell and the second interface at the bottom of the shell, the condenser is connected in series between the first interface and the second interface through a pipeline, and the evaporative cooling medium vaporized in the shell can flow into the condenser from the first interface through pressure difference, then the evaporated cooling medium is returned to the shell through the second interface after being liquefied and released heat in the condenser, thereby further improving the heat dissipation efficiency of the arrester, rapidly dissipating the heat on the resistance valve plate, effectively reducing the temperature of the resistance valve plate, preventing the arrester from being damaged due to overhigh temperature, and the voltage resistance of the arrester is further improved, so that the arrester can normally and stably operate at a high charging rate for a long time in a power transmission system with continuously improved power transmission voltage class, and meanwhile, the aging loss and the failure rate of the arrester are reduced.
The beneficial effects that the power transmission system provided by the invention can achieve are the same as those that the lightning arrester provided by the technical scheme can achieve, and are not repeated herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a lightning arrester according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a condenser according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a condenser according to another embodiment of the present invention;
fig. 4 is a schematic structural view of a lightning arrester according to another embodiment of the invention;
fig. 5 is a schematic view showing a structure of a lightning arrester according to still another embodiment of the invention;
fig. 6 is a schematic structural view of a lightning arrester according to still another embodiment of the present invention.
Reference numerals:
102-shell, 104-resistance valve plate, 106-lightning arrester core column,
108-first interface, 110-second interface, 112-condenser,
114-evaporative cooling medium, 116-external circulation pipe, 118-water machine,
120-metal spacer, 122-first channel, 124-second channel,
126-water inlet pipe, 128-water outlet pipe, 130-first electrode,
132-second electrode, 134-liquid separation spray head, 136-liquid collection disc,
138-liquid discharge pipe, 20-converter valve tower and 202-water cooling circulation pipeline.
Detailed Description
For the convenience of understanding, the lightning arrester and the power transmission system provided by the embodiment of the invention are described in detail below with reference to the attached drawings.
Referring to fig. 1, an arrester according to an embodiment of the present invention includes: the lightning arrester comprises a shell 102, wherein a lightning arrester core column 106 formed by stacking a plurality of resistance valve plates 104 is installed in the shell 102, a first interface 108 is arranged at the top of the shell 102, and a second interface 110 is arranged at the bottom of the shell 102; a condenser 112 disposed outside the housing 102 and connected in series between the first interface 108 and the second interface 110 through a pipeline; wherein, the housing 102 is provided with an evaporative cooling medium 114 therein, and the lightning arrester core column 106 is soaked in the evaporative cooling medium 114.
The lightning arrester provided by the invention comprises a shell 102 and a plurality of resistance valve plates 104 arranged in the shell 102, wherein the plurality of resistance valve plates 104 are stacked to form a lightning arrester core column 106, and the plurality of resistance valve plates 104 of the lightning arrester core column 106 are connected in series between a power grid and a ground wire in use so as to protect electrical equipment from being damaged by transient overvoltage. Because the evaporative cooling medium 114 is arranged in the shell 102, the arrester core column 106 is soaked in the evaporative cooling medium 114, when the arrester passes through a large short-circuit current, the resistance valve plate 104 generates heat, and the evaporative cooling medium 114 evaporates to absorb heat, so that the temperature of the arrester core column 106 can be quickly reduced, the risk of overheating and burning the resistance valve plate 104 is effectively reduced, and the transient absorption capacity of the arrester is greatly improved. Further, by providing a first port 108 at the top of the housing 102, a second port 110 at the bottom of the housing 102, a condenser 112 outside the housing 102, and the condenser 112 is connected in series between the first port 108 and the second port 110 through a pipeline, the vaporized cooling medium 114 inside the housing 102 can also be caused to flow into the condenser 112 from the first port 108 by a pressure difference, then the heat is liquefied and released in the condenser 112 and then returned to the shell 102 through the second interface 110, thereby recycling the evaporative cooling medium 114, further improving the heat dissipation efficiency of the arrester, rapidly dissipating the heat on the resistance valve plate 104, effectively reducing the temperature of the resistance valve plate 104, preventing the arrester from being damaged due to overhigh temperature, and further, the voltage resistance of the lightning arrester is improved, so that the lightning arrester can normally and stably operate at a high charging rate for a long time in a power transmission system with continuously improved power transmission voltage class.
It is worth mentioning that, with the continuous development of the ultra-high Voltage transmission technology, a transmission system combining a Line Coordinated Converter (LCC) and a Voltage Source Converter (VSC) becomes an indispensable part of the operation of the power grid. For example, in one common configuration of a power transmission system, the inverting side thereof is typically provided with at least one LCC and at least one VSC in cascade; the LCC is used for bearing high-voltage section voltage, such as 400 kV-800 kV; VSCs are used to carry low voltage segment voltages, such as 0kV to 400 kV. The LCC in the power transmission system has strong dependence on a receiving-end alternating current system, and is easy to cause phase commutation failure when the receiving-end alternating current system has alternating current fault, and the voltage drops to zero to form a short-circuit path. And the VSC does not have the current path to form when receiving end alternating current system appearance ac fault, also makes LCC carry out the voltage current transfer to cascaded VSC, charges to the electric capacity in the VSC. The voltage on the capacitors within the VSC will therefore increase rapidly with increasing fault current. Through setting up this arrester in above-mentioned power transmission system, because this arrester radiating efficiency is high, has higher charge rate, and the electric current under continuous operating condition can be bigger, and the residual voltage is lower, and the earial drainage effect is better for the voltage electric current that bears is difficult for exceeding its withstand voltage and current ability on the VSC, has improved the protection effect to VSC.
The lightning arrester provided by the embodiment of the invention has the advantages of compact structure, no need of power for self-circulation, high heat exchange efficiency and the like. It should be noted that the evaporative cooling medium 114 reaches the boiling point, i.e., changes phase to vapor and flows upward, so that a pressure difference is generated between the first interface 108 at the top of the housing 102 and the second interface 110 at the bottom of the housing 102, which enables the evaporative cooling medium 114 to circulate between the condenser 112 and the housing 102, so that the evaporative cooling medium 114 can be cooled by the condenser 112.
The evaporative cooling media 114 is insulating and has a low boiling point. The latent heat of vaporization generated by the low-boiling point evaporative cooling medium 114 can carry away the heat of each resistance valve plate 104, so as to reduce the temperature of the resistance valve plate. During operation, heat generated by each resistance valve plate 104 is transferred to the evaporative cooling medium 114, the evaporative cooling medium 114 absorbs heat, the temperature rises, when the temperature reaches a saturation temperature under a certain pressure, the evaporative cooling medium 114 starts to boil, the evaporative cooling medium 114 vaporizes to absorb heat, the vaporized medium steam transfers heat to secondary cooling water in the condenser 112, and meanwhile, the medium steam is cooled into liquid and returns to the shell of the lightning arrester to continue circulation. Through above-mentioned scheme, make the arrester have very high cooling efficiency.
Illustratively, the evaporative cooling media 114 is Vertrel XF (HFC-4310mee, decafluoropentane).
The insulating shell 102 is selected as the shell 102, and can protect the lightning arrester core column 106, so that the lightning arrester core column 106 is not easily interfered by external environment, various impurities such as external dust and sewage are not easily attached to the surface of the lightning arrester core column 106, and the safety and reliability of the lightning arrester core column 106 are improved.
Illustratively, the insulating housing 102 may be an epoxy housing 102 made of an epoxy material, or a ceramic housing 102 made of a ceramic material; when the insulating housing 102 is an epoxy resin housing 102, a silicone rubber shed can be sleeved on the epoxy resin housing 102, and the epoxy resin housing 102 and the silicone rubber shed can be integrally formed; when the insulating housing 102 is a ceramic housing 102, a ceramic shed may be sleeved on the ceramic housing 102, and the ceramic housing 102 and the ceramic shed may be integrally formed.
Illustratively, the condenser 112 includes a heat exchange coil having a shape including, but not limited to, a spiral, an S-shape, an N-shape, and the like. In addition, in order to enhance the heat exchange effect between the heat exchange coil and the external environment, a plurality of radiating fins can be arranged on the heat exchange coil, and a gap is reserved between any two radiating fins.
In some embodiments, as shown in FIG. 2, the condenser 112 includes a first passage 122 communicating between the first port 108 and the second port 110, and a second passage 124 spaced from the first passage 122.
In this embodiment, the condenser 112 is provided with the first channel 122 and the second channel 124 which are arranged at intervals, and the first channel 122 is communicated between the first interface 108 and the second interface 110, so that the evaporative cooling medium 114 flowing through the first channel 122 can be cooled by introducing a fluid medium, such as water, nitrogen, a refrigerant and the like, into the second channel 124, and the condenser 112 has the advantages of simple structure, high heat exchange efficiency, convenience in installation and maintenance and high practicability. Through the above scheme, further improved the radiating efficiency of arrester, effectively reduced resistance valve piece 104's temperature, make resistance valve piece 104 be difficult for damaging because of the high temperature, and then improve the withstand voltage ability of arrester, make this arrester can be in the continuous transmission system who promotes of transmission voltage class long-time normal stable operation, improve the protection effect to VSC.
Referring to fig. 3, in order to enhance the cooling effect of the fluid medium in the second channel 124 on the evaporative cooling medium 114 flowing through the first channel 122, the first channel 122 may be disposed in the second channel 124, so that the fluid medium in the second channel 124 may directly contact with the outer surface of the first channel 122, and thus the evaporative cooling medium 114 flowing through the first channel 122 may be cooled better, and the heat exchange efficiency is higher.
In some embodiments, referring to fig. 1, the arrester further comprises: two ends of the external circulation pipe 116 are respectively butted with two ends of the second channel 124 to form a closed loop passage, and cooling water is arranged in the closed loop passage; the water machine 118 is disposed on the external circulation pipe 116.
In this embodiment, by providing the external circulation pipe 116, the two ends of the external circulation pipe 116 and the two ends of the second channel 124 are respectively butted to form a closed loop, then cooling water is provided in the closed loop, and the water machine 118 is provided on the external circulation pipe 116, so that the cooling water can be circulated in the closed loop by the water machine 118, that is, when the external circulation pipe 116 and the second channel 124 are circulated, the cooling water exchanges heat with the evaporative cooling medium 114 in the first channel 122 when flowing through the second channel 124, so as to reduce the temperature of the evaporative cooling medium 114, and then the cooling water after exchanging heat flows into the external circulation pipe 116 from the second channel 124, so as to dissipate the heat to the external environment through the external circulation pipe 116. Through the above scheme, further improved the radiating efficiency of arrester, effectively reduced resistance valve piece 104's temperature, make resistance valve piece 104 be difficult for damaging because of the high temperature, and then improve the withstand voltage ability of arrester, make this arrester can be in the continuous transmission system who promotes of transmission voltage class long-time normal stable operation, improve the protection effect to VSC.
In some embodiments, referring to fig. 4 to 6, the arrester further includes a water inlet pipe 126 and a water outlet pipe 128 respectively disposed at two ends of the second passage 124, the water inlet pipe 126 and the water outlet pipe 128 are respectively communicated with the second passage 124, and the water inlet pipe 126 and the water outlet pipe 128 can be connected to the water cooling circulation pipeline 202 of the converter valve tower 20.
In this embodiment, the shapes of the water inlet pipe 126 and the water outlet pipe 128 and the specific arrangement positions thereof can be set according to actual needs, for example, the water inlet pipe 126 and the water outlet pipe 128 adopt a circular structure or an arc structure, and the water inlet pipe 126 and the water outlet pipe 128 are located on the same side or opposite sides of the condenser 112. The water inlet pipe 126 and the water outlet pipe 128 are respectively communicated with the second channel 124, and the water inlet pipe 126 and the water outlet pipe 128 can be connected to the water-cooling circulation pipeline 202 of the converter valve tower 20, that is, the second channel 124 of the condenser 112 can be integrated with the water-cooling circulation pipeline 202 of the converter valve tower 20, and the evaporative cooling medium 114 flowing through the first channel 122 can be cooled by using the cooling water in the water-cooling circulation pipeline 202, so that the flowing circulation of the cooling water can be uniformly managed, the uniform control of the lightning arrester and the water cooling of the power transmission system where the converter valve tower 20 is located can be realized, and the practicability and the reliability are high.
In some embodiments, referring to fig. 5, the lightning arrester further includes a liquid distribution nozzle 134 disposed on the water inlet pipe 126, a liquid inlet of the liquid distribution nozzle 134 is communicated with the water inlet pipe 126, and a liquid spraying port of the liquid distribution nozzle 134 faces the condenser 112.
In this embodiment, the liquid distributing nozzle 134 is disposed on the water inlet pipe 126, the liquid inlet of the liquid distributing nozzle 134 is communicated with the water inlet pipe 126, the liquid spraying port of the liquid distributing nozzle 134 faces the condenser 112, and part of the cooling water in the water inlet pipe 126 can be sprayed on the condenser 112 through the liquid distributing nozzle 134, so that the temperature of the evaporative cooling medium 114 flowing through the first channel 122 can be further reduced, and the evaporative cooling effect of the evaporative cooling medium 114 on the resistance valve plate 104 is greatly improved. Through the above scheme, improved the radiating efficiency of arrester by a wide margin, can effectively reduce the temperature of resistance valve piece 104, make resistance valve piece 104 be difficult for damaging because of the high temperature, and then improve the withstand voltage ability of arrester, make this arrester can be in the continuous transmission system who promotes of transmission voltage class long-time normal stable operation, improve the protection effect to VSC.
In some embodiments, referring to fig. 5, the arrester further comprises a drip pan 136 disposed below the condenser 112, the drip pan 136 having a drain hole at a bottom thereof.
In this embodiment, through installing the drip pan 136 in the below of condenser 112, can collect the cooling water that sprays on condenser 112 through drip pan 136 to make the cooling water concentrate the discharge from the outage, realize the concentrated collection and the processing to the comdenstion water, make the cooling water be difficult for causing the harm to arrester and other electrical equipment nearby, improved security and reliability, this drip pan 136 has simple structure, practical advantage.
Illustratively, the drip pan 136 is removably attached to the condenser 112, such as by screws, bolts, snaps, or the like. Of course, in order to improve the relative stability between the drip pan 136 and the condenser 112 and further reduce the cooling water on the condenser 112 from falling outside the range of the drip pan 136, the drip pan 136 and the condenser 112 may be integrally formed, for example, integrally cast or welded.
In some embodiments, referring to fig. 5, the arrester further includes a drain pipe 138 communicating the drain hole with the outlet pipe 128.
In this embodiment, the drain pipe 138 is arranged to communicate with the drain hole and the water outlet pipe 128, so that the cooling water collected by the liquid collecting tray 136 can sequentially pass through the drain hole, the drain pipe 138 and the water outlet pipe 128 and then return to the water cooling circulation system, the flowing circulation of the cooling water is conveniently and uniformly managed, the uniform control of the water cooling of the power transmission system where the lightning arrester and the converter valve tower 20 are located is realized, and the practicability and the reliability are high.
In some embodiments, referring to fig. 1 and 4-6, the condenser 112 is located above the level of the evaporative cooling media 114 within the housing 102. Therefore, the gaseous evaporative cooling medium 114 can be substantially contained in the first channel 122 of the condenser 112, and the gaseous evaporative cooling medium 114 can be liquefied and released heat and then can return to the bottom of the shell 102 through the pipeline and the second connector 110 under the action of gravity, so that the circulating flow effect of the evaporative cooling medium 114 is improved, and the cooling effect on the resistance valve plate 104 is further enhanced due to high fluidity, so that the resistance valve plate 104 is not easily burnt by overheating when the lightning arrester is subjected to overvoltage.
In some embodiments, the lightning arrester further includes a plurality of metal spacers 120, and each metal spacer 120 and each resistive valve plate 104 are alternately stacked in sequence.
In this embodiment, by arranging the plurality of metal pads 120 and arranging the metal pads 120 and the resistance valve plates 104 in an alternate and overlapping manner in sequence, on one hand, the plurality of resistance valve plates 104 can be connected in series as a conductor, on the other hand, two resistance valve plates 104 can have a gap, and the heat dissipation effect of the resistance valve plates 104 is improved. And partial heat on the resistance valve plate 104 can be conducted to the corresponding metal cushion block 120, so that the temperature of the resistance valve plate 104 can be further reduced, and the occurrence of overheating and burning of the resistance valve plate 104 is reduced.
The metal mat 120 is generally made of a conductive material such as copper or aluminum material as a transmission medium of voltage and current.
In some embodiments, referring to fig. 4-6, the surge arrester further includes a first electrode 130 and a second electrode 132 respectively connected to both ends of the surge arrester stem 106 in the axial direction, the first electrode 130 and the second electrode 132 respectively extending outside the housing 102. In this embodiment, the first electrode 130 and the second electrode 132 are provided to facilitate connection of the lightning arrester with an external device, for example, between a power grid and a ground wire.
In another aspect, referring to fig. 6, an embodiment of the invention provides a power transmission system comprising a lightning arrester according to any of the above-mentioned aspects.
According to the power transmission system provided by the invention, the lightning arrester can be connected into the water-cooling circulation pipeline 202 of the converter valve tower 20 through the water inlet pipe 126 and the water outlet pipe 128, that is, the second channel 124 of the condenser 112 can be integrated with the water-cooling circulation pipeline 202 of the converter valve tower 20, and the evaporative cooling medium 114 flowing through the first channel 122 can be cooled by using the cooling water in the water-cooling circulation pipeline 202, so that the flowing circulation of the cooling water can be conveniently and uniformly managed, the uniform control on the lightning arrester and the water cooling of the power transmission system where the converter valve tower 20 is located can be realized, and the practicability and the reliability are high. Through the above scheme, can also further improve the radiating efficiency of arrester, effectively reduce the temperature of resistance valve piece 104, make resistance valve piece 104 be difficult for damaging because of the high temperature, and then improve the withstand voltage ability of arrester, make this arrester can be in the continuous transmission system who promotes of transmission voltage class long-time normal stable operation, improve the protection effect to VSC.
In summary, when the lightning arrester provided by the present invention is used in a power transmission system, a water cooling system does not need to be separately provided, and the cooling capacity and flow rate are adjusted accordingly during valve cooling design, so that the inlet pipe 126 of the lightning arrester is introduced into the main water pipe branch line of the valve hall, and the lightning arrester and the valve cooling system (i.e., the water cooling circulation pipeline 202 of the converter valve tower 20) can share cooling water.
It is to be noted that the cooling water mentioned in the above examples is usually high-purity water having an electric conductivity of 0.3. mu.s/cm or less. In order to ensure the cooling efficiency of the cooling water, on the basis of the above embodiment, optionally, a liquid pump is arranged on the water inlet pipe 126, and the pressure of the cooling water entering the second channel 124 is increased by using the liquid pump, so that the conveying flow of the cooling water in the second channel 124 can be accelerated, thereby ensuring the cooling efficiency of the cooling water on the evaporative cooling medium 114 flowing through the first channel 122, and further improving the heat dissipation efficiency of the resistance valve plate 104. In addition, optionally, in this embodiment, a flow controller is disposed on the water inlet pipe 126, and a temperature detector is disposed on the water outlet pipe 128, so that the flow rate and the flow speed of the cooling water can be controlled by the flow controller in real time, so as to meet the cooling requirements of the resistance valve plate 104 at different temperatures. It should be added that the flow controller may adopt a flow control valve or a throttle valve, etc.
In order to realize the automatic control, on the basis of the above embodiment, optionally, an automatic control unit is further provided, and an input end of the automatic control unit is in signal connection with the temperature detector, so as to obtain the temperature of the cooling water at the water outlet pipe 128 through the temperature detector; the output end of the automatic control unit is respectively connected with the liquid pump and the flow controller through signals, so that the working states of the liquid pump and the flow controller are automatically controlled according to the acquired temperature of the cooling water at the water outlet pipe 128, and further, the flow and the flow speed of the cooling water are automatically controlled.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An arrester, characterized in that the arrester comprises:
the lightning arrester comprises a shell, a first connector and a second connector, wherein a lightning arrester core column formed by stacking a plurality of resistance valve plates is installed in the shell;
the condenser is arranged outside the shell and is connected in series between the first interface and the second interface through a pipeline;
the shell is internally provided with an evaporative cooling medium, and the lightning arrester core column is soaked in the evaporative cooling medium.
2. A surge arrester as claimed in claim 1 wherein the condenser comprises a first passage communicating between the first and second ports, and a second passage spaced from the first passage.
3. The surge arrester of claim 2 further comprising:
two ends of the external circulation pipe are respectively butted with two ends of the second channel to form a closed loop passage, and cooling water is arranged in the closed loop passage;
and the water machine is arranged on the external circulation pipe.
4. The arrester according to claim 2, characterized in that the arrester further comprises a water inlet pipe and a water outlet pipe respectively arranged at two ends of the second channel, the water inlet pipe and the water outlet pipe are respectively communicated with the second channel, and the water inlet pipe and the water outlet pipe can be connected to a water-cooling circulation pipeline of a converter valve tower.
5. The arrester of claim 4 further comprising a liquid distribution nozzle disposed on the water inlet pipe, wherein a liquid inlet of the liquid distribution nozzle is communicated with the water inlet pipe, and a liquid spraying port of the liquid distribution nozzle faces the condenser.
6. A lightning arrester according to claim 5, characterized in that the lightning arrester further comprises a liquid collecting tray arranged below the condenser, the bottom of the liquid collecting tray being provided with liquid discharge holes.
7. A surge arrester according to claim 6, further comprising a drain pipe communicating the drain hole with the outlet pipe.
8. A lightning arrester according to any of claims 1-7 characterized in that the condenser is located above the level of the evaporative cooling medium in the housing.
9. The arrester according to any one of claims 1 to 7, further comprising a plurality of metal spacers, wherein each metal spacer is alternately stacked with each resistance valve plate in sequence.
10. An electric power transmission system, characterized by comprising an arrester as claimed in any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910955633.0A CN110660549A (en) | 2019-10-09 | 2019-10-09 | Lightning arrester and power transmission system |
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| CN201910955633.0A CN110660549A (en) | 2019-10-09 | 2019-10-09 | Lightning arrester and power transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420298A (en) * | 2020-09-15 | 2021-02-26 | 国网浙江省电力有限公司湖州供电公司 | Lightning arrester with strong heat dissipation performance for power transmission line |
| CN114640026A (en) * | 2021-04-23 | 2022-06-17 | 南宁超伏电气科技有限公司 | Three-state combined arc extinguishing device and arc extinguishing method |
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2019
- 2019-10-09 CN CN201910955633.0A patent/CN110660549A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420298A (en) * | 2020-09-15 | 2021-02-26 | 国网浙江省电力有限公司湖州供电公司 | Lightning arrester with strong heat dissipation performance for power transmission line |
| CN112420298B (en) * | 2020-09-15 | 2022-04-01 | 国网浙江省电力有限公司湖州供电公司 | Lightning arrester with strong heat dissipation performance for power transmission line |
| CN114640026A (en) * | 2021-04-23 | 2022-06-17 | 南宁超伏电气科技有限公司 | Three-state combined arc extinguishing device and arc extinguishing method |
| CN114640026B (en) * | 2021-04-23 | 2023-12-29 | 南宁超伏电气科技有限公司 | Three-state combined arc extinguishing device and arc extinguishing method |
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